Topics - Kriogen

Hi Guys,I did check the list of supported cards for hostap and i already have 2 pfsense boxes running captive portal on WLAN, but now i am in a bit of a pickle.I recently configured 1 more Wireless SSID using the same wifi card (Atheros) and although it works, it seems to fail and get stuck if more than 5 clients connect to it. This new ssid has captive portal enabled with AD radius authentication.

Can anyone recomment me a better wifi card that supports more than 5 connections and more than just 1 SSID? Eventually a link to buy it from (UK).